What is the significance of "Depth across all samples" (DP) in INFO ?
Although I have read through the related topics, I'm still quite confused about the significance of "Depth across all samples" (DP) in INFO in the vcf file. Does "across samples" mean it addition the read depth of all the samples together or is it a mean over all the samples?
In my vcf file (after joint genotyping in gvcf mode), I obtained DP in INFO between 30 and 99 while the sample-DP are much less in general.
I think the DP in INFO is a sum of depth, am I right?